Pete was Jesse's friend, who came looking for him, played by Scott Baio. Jesse wanted to relieve his youth, by performing a dangerous motorcycle stunt that he did in his younger days. But, ended up not doing it, because of Becky and everything he's gained, since. He didn't want to risk losing all of that.

Full House: Season 3 Episode 9: Dr. Dare Rides Again.

Shannon was a British friend of Stephanie's, who came to "rescue" her from domestic responsibilities, to perform at Coachella and for non-stop partying. Stephanie came home after Coachella. She didn't attend any of the after parties. She also realized what she has gained since moving in with DJ, and didn't want to lose that.

Owlnut74 wrote:Pete was Jesse's friend, who came looking for him, played by Scott Baio. Jesse wanted to relieve his youth, by performing a dangerous motorcycle stunt that he did in his younger days. But, ended up not doing it, because of Becky and everything he's gained, since. He didn't want to risk losing all of that.

Full House: Season 3 Episode 9: Dr. Dare Rides Again.

Shannon was a British friend of Stephanie's, who came to "rescue" her from domestic responsibilities, to perform at Coachella and for non-stop partying. Stephanie came home after Coachella. She didn't attend any of the after parties. She also realized what she has gained since moving in with DJ, and didn't want to lose that.

Fuller House: Season 1 Episode 5 : Mad Max.

Also, to build off this, both Jesse and Stephanie left the Tanner/Fuller house to do their own thing and be free of responsibility. Then both had second thoughts and returned.